Industrial truck



E. H. REF-WEE Earn, 29

INDUSTRIAL TRUCK Filed Oct. 5

Dec. 29, 1925- E. H. REMDE INDUSTRIAL TRUCK 3. 1922 4 Sheets-Sheei 4 Filed Oct.

vrrl llmlillh Patented Dec. 29, 1925..

' UNIT-ED, STATESYPATENT orrics.

EDWARD H. BEMDE, CLEVELAND, OHIO, ASSIGNOR TO TI IE BAKER R. 86 L. GOM- FANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

INDUSTRIAL TRUCK.

' ,Application filed October 3, 1922. Serial No. 592,138-

To all whom it may concern:

Be it known that I, EDWARD H. Ramon, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in and Relating to Industrial Trucks, ofwhich the following is a specification. -"This invention relates to an industrial truck, more particularly an industrial truck having an elevating device or platform.

One object of the invention is to provide in av truck of this character improved ele-v vating means for the elevating device or platform, capable of raising and lowering he latter in a. rapid and easy manner,

whereby loads may be moved vertically. and

readily transported. Y Another object of the invention is to provide ina truck of this character improved elevating means, in which the power to raise and lower the platform is applied without tendency to distort the platform in its guide members while moving vertically; A- further object of the invention is to provide in a truck of this character an improved elevating mechanism in which winding drums are disposed at opposite sides of a centrally arranged driving means and the flexible members or ropes to be wound on and from said drums run over sheaves which are so disposed that the pull or tension on the flexible members or ropes is equalized to effect rectilineal movement of the platform.

Other objects of the invention will be apparent to those skilled in the art to which my invention relates from the following description taken in connection withthe accompanying drawings, wherein- Fig. 1 is a side elevation of a truck embodying my invention.

Fig. 2 is a fragmentary perspective view, enlarged, showing the elevating means.

Fig. 3 is a fragmentary elevation, venlarged, of the motor and power transmitting means between it and the winding drums,

partly in section.

Fig. 4 is a section on the line 44' of Fig. 3.

' In the drawings, 1 indicates as an entirety a frame comprising a main'sectionfl and a sub-section 3, preferably arranged n a plane below the main section. The mam section is preferably constructed as described and" claimed in my co pe'ndin application, filed November 20, 1920, erial No. 425,555 Patent No. 1,554,167, datedi j Sept. 15, 1925. The inner or adjacent .endsflT. of the main section 2 and sub-section 3 are' fifl, preferably connected'by a' pair of-angle members 4, each riveted to the frame members or sections in a well known manner.

The sub-section 3 preferably comprises pairs of parallel members 5. 6 indicates a pair of wheels disposed below and preferably within the sides of the main section 2. The wheels 6 are preferably pivoted to an axle (not shown) by means of knuckle joints in a well known manner, whereby they may be'turned for steering purposes. 7 indicates a pair of wheels mounted on an axle (notshown) uponwhich'the sub-section 3 issupported. The wheels 7 are preferably arranged to be swung about a vertical axis or axes for steering purposes, being connected by a link 8 'and'rod 9 to the steering column 10 for the wheels 6, whereby all four wheels may be simultaneously operated by .a turn ing lever 11. 12 indicates a motor for driving the wheels 6.- The motor 12 is operatively connected with the wheels by suitable power transmitting mechanism (not shown) 13 indicates a suitable battery or batteries removably supported on the frame section 2 and arranged to supply current to the motor 12. The batteries 13 may be inclosed in a suitable casing 13. 14 indicates a controller interposed in and controlling the circuit for the motor 12 in a well known man- 9 ner, the controller being actuated by a suitable lever 15. 16 indicates a step or base on which the operative stands when operating the truck, the steering lever 11 and Hi the controller handle or lever 15 being ari l ranged within convenient reach fonthis purpose. 17 indicates a foot ped'al for controlsi ling the brake or brakes '(notfshowny for the teak. I i

18 iii icates a pair of spaced guide mom-i bers disposed vertically, preferably intermediate the ends of the truck frame 1. In the illustrated cmbodlmentl'tof truck 0011- struction the=guidemembers 18 are disposed at the connection of the inner ends 'of the sections 2. 3, with each other, this arrangement (1) permitting the guide members to be extended to or below the sub-section 3 so that the platform may be lowered lothe' desired plane and (2) facilitating the maid 19,' a1-rea'dy referred. to, connected together bracing. of-the guide-members in a vertical position.

The guide. members 18 preferably comprise a pair of I- beams, so that their flanges or side walls may serve as guides for shoes19 forming apart of an elevating device or. movable'platform 20,

to which reference will later be made" The 7 shoes 19-are preferably arranged withinthe opposingchannels of the I-beams and-'engage the inner faces of the adjacent flanges thereof. 21 indicates. a air of beams 'connected at their outer en s to Struts 22, disposed at thefront or outer end'of the main section Q'and supporting, a dash '23 and brackets24, to which the step or base 16 is connected. "At, their inner ends, the beams 21 are connected to the base portions of ably secured to the latter-b Jmeans of an end plate 26 fixed to the; gui e member andv extending laterallyqthere rom "as shown 1n. l i n'L '?he elevatiiig device orjplatform 20 com-1;, prises-1a 'shqemeinber 27 and av latformmember 28'connec ted thereto. The s oemem ber 27 preferably; comprises agpairv of shoes bya pair ofjspacledplatesj2 9 and upper and lower shoe elements 30 carried by each shoe 19 andengaging the inner side walls of the adjacent guide member 18. Each shoe element 30 consists of a roller loosely mounted'on a stud shaft 31 supported inthe wall of the adjacent shoe 19. The shafts '31 areinclined so that the circumferential surfaces ofthe rollers may"'engage the inclined inner surfaces of the side walls of the adjacent guide member 18 without .un-

, due friction. As will be understood from Fig.. 1, the studshafts 31 carried by each shoe 19 are inclined at an angle relative [0 each other and parallel to'the faces of the flat "asor 'side, walls of the adjacent gu1de'member'18 with which they engage, respectively, so that the lower roller will engage. its rear side .wall and the upper roller'will engage its front side wall The platform member 28 preferably comprises a pair of spaced arms 28 extending laterally relative to the shoe member 27'over the sub-section 3 'and a plate 28"" disposed on the arms 28". The plate may be provided with side walls 28 audits outer end may extend beyond the arms 28. Each of the arms 28 is provided witha hinge element 28.

correlated with a hinge element; at the lower end of the adjacent shoe 19, being connected ,theretoby pivot pin 28 which connects the hinge elements of both arms to the shoes, this construction permitting the latform to swing upwardly'at its free emf 34 is secured to 40 in any desired manner, forexample by Thelparts and elements above described correspondto like parts and elements shown and described in my co pen'ding applica-',

tion, filed April 14, 1922, Serial No. 552,780,- for which reason further description herein is deemed unnecessary. v. 32. indicates as an entirety the hoisting or elevatingmechanism for the elevating device or platform 20. Of this mechanism, 33 indicates a motor, preferably'of the electric type, arranged to be supplied withcurrent from the batteries 13 and operated by means of a controller 33". 34% indicates a supporting member, to which .the motor is secured in ya well known manner, preferably by cap screws34. The lower: portion of thesupporting member 34 is shaped to forma housing 34 for power, transmitting means 35'. 36 indicates a shaft preferably of sectional character, which. is driven by thepower means 35,'the sections 36*, 36, constituting the shaft; 36 extending laterally in opposite directions through the housing 34? and having connected to their-outer end drums 37, 37',,'to which reference will later be made.

shown in'Fig. 3, the housing 34' is formed in its opposite sides with aligned openings 38, through which the shaftsec- -tions 36 extend. 39 indicates "a pair. of

spaced standards mounted onthe frame section 2, preferably nea-r its rear or inner end between the guide members '18 and the .bat-

tery housing 13., and serving as supporting means for the power transmitting means 35, the supporting member 34 and the motor 33. As shown, the standards 39 are arranged to support the motor 33 with its armature shaft in. the central longitudinal plane of the truck frame 2 and the drums 37 ,j 37', at equal distances from and at the op-- posite sides of that plane. Each standard- 39 is preferably provided with front and rear feet, the former being bolted to the rear side wallof the frame2 or an angle bar '2' carried thereby and the latter being secured to an angle bar 39*, extending transversely I .of the frame 2the upstanding wall of which bar may serve as a stop for the battery housing 13' (see Figs. 1 and 2). At their upper ends, the standards 39 are provided with flanged collars 40, which are in axial alignment with the openings 38 and support sleeves drums 3-7, 37', to rotate on. The housing the flanges 40' of the collars is provided with'a flange 44 around its inner end."- Toprovidea flange forjthe outer end of the drum, .I' 'secure thereto, preferably by cap screws 45, around 'late 46. The plate 46 has ai'hub 47, which, ts over and is keyed or splined'to' v the outer or free end of the ad- 41, forming shafts for the 1 jacent shaft section 36, such connection serving to transmit the rotary movement of the shaft to the drum. The power means 35 preferably comprise a'p'ropell'er shaft35", supported in bearings35 in the housing 34? and connected-by a suitable joint ,35 with the armature shaft 35. The bearings 35 may be mounted in a section 3 which forms a cover for the housing. The cover 34 may be secured in position byscrews 34. The shaft 35 is provided with a worm being ronnect'ed to the opposite end of the 46', which meshes with a wormigcar 47f.

' The'worm gear 47' is preferably secured between the flanges 48, 48., of a pair. of annular members 49, 49', respectively, having telescoping'collars 50,50, the inner one of which is keyed to the inner ends of the shaft sections 36 in a wellknown way. 51 indicates bearings suitably supported in the housing 34 and serving to rotatably support the annular members 49, 49. The up er end of the armature shaft 35 extends eyond the motor 33 and carries a Wheel 52 with which a brake band or shoes 53 mayv engage to stop the motor and'through t the platform 20 ahd'hold the. latterin any desired position in which it rnay be stopped.

The brake shoes 53 are connected to an operating lever 53' which is operated to apply the brake by a spring55 and'to release the brake by a solenoid 56, preferably connected in series with the motor, 33.5 54 indicates a ends of the guidemembers 18, being supported upon and secured to flanges-55' provided on the plates 26. 56'indicates hangers -disposed :bet'ween and secured to the channel'bars 54. The hangers 56'are-provided with suitable bearings 57 which support the opposite ends of a' shaft 58-. '59, 59, and 60,60, indicate pairs of sheaves loosely mounted'onthe shaft 5.8 and arrangfiad equal distances from a point midway tween the guide members 18. 61, 61' indicate a pair of sheaves loosely mounte on a shaft 61. s'upported'at its opposite ends in the'chan nel bars 54 and arranged at right angles to theshaft 58 with its-axis in a plane midway between the drums, 37, 37. 62, 62' and 63, 63' indicate airs of sheaves loosely mounted on shafts'l6 65, 'respectively,'preferably disposed at opposite sides of and equal distances from the plane in which the shaft 61 is supported and supported at their opposite ends in the plates 29. '66, 66', indicate ropes or other flexible members which 'run' over. and around the sheaves and'are adapted to be wound on and from the drums 37, 37. to raise and lower the platform 20,

;together with. whatever, load is to be carsheave 62 and then over the sheave 61. From the sheavefil, the rope 66 runs around the sheave 63- and then around the sheave 60, its

freev end being connected-to one'end of an equalizing element 67, which is pivoted on a pivot 68, disposed in the plane of the shaft 61.and supported by" a cross bar 68, secured .on the guide members 18. The rope. 66 extends frointhe drum 37 over the sheave 60',

stood. From the foregoing description, it-

will be seen that the ropes 66, 66, are wound on and off drums which are disposed at opposite sides of the central longitudinal plane .of the truck frame, or a point which is mid-.

way between the guide members; also that the ropes or cables are carried over sheaves and guided so that the pull thereon incident to raising and lowering the platform and its load is equalized and. acts simulta' '-ne0usly through the sheaves carried by theelevating device 20, and the shafts therefor, to operate the platform vertically and in a directionpa'rallel to the guide members 18-. thereby eliminating any tendency to pullon V the elevating device or platform 20 is guidedfreely between the guide members in its vertical movements without undue friction or I or raise or lower .one side of the shoe mem-' pair of channel bars connecting the upper ber faster than the other side. As a result,

binding therein or strains on the elevating" mechanism. Furthermore, in winding on and from the drums and running around --the gulde' sheaves. the tension in both ropes is the same, so that they (1) operate uniformlyin running over and around the latter and (2) wear substantially equally.

' 69 indicates means for. automatically stopping the motor 33' when the elevating device or other of movement of the elevating device or platform. 20. As these means are described and claimed inand forms the subject-matter'of a co-pending application Se'r. No....706,339, no claim is'niade herein to said stopping means.

' To those construction and widely differing embodi- 'ments -of the invention and applications slrilled inthe art to which my inventlon relates, many modifications in thereof will suggest themselves without departing from thespirit and scope thereof. The-descriptions and the disclosure herein 4- v I 1,567,:s7e

are purely illustrative and are not intended" frame and wheels therefor, of a pairofto be in any sense limiting. 1

What I claim is: i 1. In a truck, the Combination with. a .frame'and wheels therefor, of a pair of .relat'vely movable members, one of said I mem is including a pair of vertical-guides 'mounted on said frame and the other member comdprising an elevating device slidably mounte in said guides, a pluralityof pairs of sheaves carried by said members, one pair being'mounted on oneof said members on an ax s disposed midway between said uides and the other (pairs being carried by t e'other member an disposed at opposite sides of and equal distances from sa1d axis,

a pair of drums carried by one of said memand disposed at opposite sides of and equal distances from sa1d axis, means for rotating said drums, flexible hoisting members, each arranged to wind on and. off one ofsaid drums and engage one sheave of each pair thereof, and means for securing the free ends of said hoisting members to oneof said relatively movable members.

-2. In a truck, the combination with aframe and wheels therefor, of a pair of- -relatively movable members, one of said members including a vertical frame mounted on said frameand provided with guides and the other member comprising an elevating device slidably mounted in said guides, a plurality of pairs of sheaves carried by said members, one of said pairs of sheaves beingmounted on, said guide frame on an axis dis osed midway between said guides,

a pair 0 drums carried by one of said members and disposed at opposite sides of and equal distances from said. axis, means for rotating said drums, flexible elevating members, each arranged to wind on and off one a of sa1d drums and engage one sheave of each pair thereof, andmeans for securing thefree ends of said hoisting members to one of said relatively movable members.

'3. In a truck, the combination with a I frame and vwheels therefor, of a vertical frame constituting guides, mounted on said first mentioned frame, .an elevating device slidablymountedin said guides, a plurality of pairs of sheaves carried by said vertical frame and elevating device, one of said pairs of sheaves being mounted on said frame on an axis disposed midway between the guides, a air of drums carried by said first mentione frame and-disposed at opposite sides of and equal distances from the axisof the pairof sheaves on said guide frame,means for rotating said drums, fiexi ble ihoisting members, each. arranged to windon and off one of said drums at one .1 end and toengage one sheave of each pair thereof, and means for operatlvely connect- I ing the opposite ends of'said flexible members to one of said frames. e

.4. In a truck, the combination with a relatively movable members, one 'of. said members including avertica'l frame mounted on said first mentioned frame and provided with guides and the other" member comprising an elevating device slidably mounted in' said uides, pairs of sheavesr carried by each 0? said members and dis-i posed at opposite sides of and equal dis- '71s tan cesfrom a point midway between said guides, a separate pair of sheaves mounted on oneof said members on anaxis dis-- posed midway between said guides, a air j of drums carried by one of said .mem ers 8 0 p and disposed at opposite sides of and equaldistances from the axis of said separate pair of sheaves, means for rotating ,said drums,

slidably mounted in said guides, a lurality i of pairs of sheaves carried'by sai vertical frame and said device, one pair of said sheaves being mounted on said ide frame onan axis disposed'midway tween .the guides, a pair of drums carried by said first mentioned frame and disposed at o positesides of and equal distances fromt e'axis of the pair of sheaves on said guide frame, means for rotating said drums, an e ualizing element secured to said guide rame, 1

flexible hoisting members, each arranged to wind on and off one of said drums and engage one sheave of each pair thereof, and. means for securing the free ends of said"- hoisting members to the ends of said equalizing element. .6. In a truck, the combination with a frame and wheels therefor, of a pair of relatively movable members, one of said members including a pair of vertical guides mounted on said frame and the other member comprising an elevating device slidably mounted in saidguides,a plurality of pairs of sheaves carried by said relatively-moth. 5} able members; one pair of said sheaves be- .2 ing mounted on one of said members on an axis disposed midway between said ides, a pair of drums carried by one of said i neni bers and disposed at oppositasides of and equaldistances from said axis, means for ro cured to that end of the equalizing element remote from the drum on which it winds.

7. In a truck, the combination with a frame and wheels therefor, of a vertical. frame mounted, on said first mentioned frameand provided with guides, an elevat-' ing device slidablymounted in said guides, an equallzing device movably mounted on one of said frames in a plane midway between said guides, a pair of driven elementscarried by said first mentioned frame and disposed at o posite sides of and equal dis tances from tiie plane midway between said guides, a pair of flexible hoisting members, each arranged to engagefone of said driven elements at one end and operatively connected at its opposite end to said equalizing device, and a plurality of rotatable elements carried by'said vertical frame and said elevating deviceover'which said hoisting mem bers run.

8. In a truck, the combination with a frame and wheels for said frame, of a pair of vertical guides mounted on said frame, a battery on said frame in spaced relation to said guides, an elevating device slidably engaging said guides, a motor and power transmittin means supported between said battery an said guides, a pair of drums connected to and disposed at opposite sides of said power transmitting means, and mechanism for. raising and lowering said elevating device, said mechanism including sheaves supported upon said'guides and flexible members engaging said' sheaves and elevating devic and arranged to wind on and off said drums.

-9. In a truck,; the combination with a frame and. Wheelsfor said frame, of a guide frame vertically supported on said frame, an elevating device slidably engaging said guide frame, pairs of sheaves mounted on said guide frame and elevating device, a separate pair of sheaves disposed intermediate the pairs of sheaves on said guide frame, a pair.

of drums mounted on said frame, flexible members each engaging one sheave of each pair and arranged to Wind on and 0d one of said drums at one end, means for securing the opposlte end of each of said flexible sheaves thereon, a pair of drums, flexible.

hoisting means runmngaround correspond; mg sheaves of said pairs of sheaves and said intermediate sheaves and arranged towind on and on said drums, and means for rotatingsaid drums.

11. In a truck, the combintion with a frame'and wheels therefor, of a guide frame on said frame, an elevating device slidably engaging the guides in said uide frame, a pair of spaced sheaves carried by said guide frame, a pair of' spaced sheaves carried by said elevating device, a pair of sheaves on said guide frame intermediate the spaced sheavesthereon, a pair of drums, flexible hoisting members runningaround corresponding sheaves of said pairs of' sheaves and said intermediate sheaves and arranged to wind on and off said drums at one end, means for rotating said drums, and an equalizing ineli'nber to which the free ends of said flexible members are connected.

12. Ina truck, the combination with a frame, wheels for said frame'and means for driving certain of said wheels, of a guide frame on said frame-,-a motor and a ower.

arranged substantially in a planebetween saidpairs of sheaves,and flexible members arranged to'wind on and off said drums and engaging said sheaves and said guiding means.

In testimony whereof, I have hereunto subscribed-my name.-

EDWARD n. REMDE, 

